Amaury Denoyelle | 5c25dc5 | 2022-09-30 17:44:15 +0200 | [diff] [blame] | 1 | #include <arpa/inet.h> |
| 2 | #include <string.h> |
| 3 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 4 | #include <haproxy/global.h> |
| 5 | #include <haproxy/ncbuf-t.h> |
| 6 | #include <haproxy/net_helper.h> |
Amaury Denoyelle | 92fa63f | 2022-09-30 18:11:13 +0200 | [diff] [blame^] | 7 | #include <haproxy/quic_conn-t.h> |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 8 | #include <haproxy/quic_enc.h> |
| 9 | #include <haproxy/quic_tp.h> |
Frédéric Lécaille | c7785b5 | 2022-05-23 09:08:54 +0200 | [diff] [blame] | 10 | #include <haproxy/trace.h> |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 11 | |
| 12 | #define QUIC_MAX_UDP_PAYLOAD_SIZE 2048 |
| 13 | |
Frédéric Lécaille | c7785b5 | 2022-05-23 09:08:54 +0200 | [diff] [blame] | 14 | #define TRACE_SOURCE &trace_quic |
| 15 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 16 | /* This is the values of some QUIC transport parameters when absent. |
| 17 | * Should be used to initialize any transport parameters (local or remote) |
| 18 | * before updating them with customized values. |
| 19 | */ |
| 20 | struct quic_transport_params quic_dflt_transport_params = { |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 21 | .max_udp_payload_size = QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE, |
| 22 | .ack_delay_exponent = QUIC_TP_DFLT_ACK_DELAY_COMPONENT, |
| 23 | .max_ack_delay = QUIC_TP_DFLT_MAX_ACK_DELAY, |
| 24 | .active_connection_id_limit = QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT, |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 25 | }; |
| 26 | |
| 27 | /* Initialize <dst> transport parameters with default values (when absent) |
| 28 | * from <quic_dflt_transport_params>. |
| 29 | * Never fails. |
| 30 | */ |
| 31 | static void quic_dflt_transport_params_cpy(struct quic_transport_params *dst) |
| 32 | { |
| 33 | dst->max_udp_payload_size = quic_dflt_transport_params.max_udp_payload_size; |
| 34 | dst->ack_delay_exponent = quic_dflt_transport_params.ack_delay_exponent; |
| 35 | dst->max_ack_delay = quic_dflt_transport_params.max_ack_delay; |
| 36 | dst->active_connection_id_limit = quic_dflt_transport_params.active_connection_id_limit; |
| 37 | } |
| 38 | |
| 39 | /* Initialize <p> transport parameters. <server> is a boolean, set if TPs are |
| 40 | * used by a server (haproxy frontend) else this is for a client (haproxy |
| 41 | * backend). |
| 42 | * |
| 43 | * This must only be used for haproxy local parameters. To initialize peer |
| 44 | * parameters, see quic_dflt_transport_params_cpy(). |
| 45 | * |
| 46 | * Never fails. |
| 47 | */ |
| 48 | void quic_transport_params_init(struct quic_transport_params *p, int server) |
| 49 | { |
| 50 | const uint64_t ncb_size = global.tune.bufsize - NCB_RESERVED_SZ; |
Frédéric Lécaille | 2674098 | 2022-05-23 17:28:01 +0200 | [diff] [blame] | 51 | const int max_streams_bidi = global.tune.quic_frontend_max_streams_bidi; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 52 | const int max_streams_uni = 3; |
| 53 | |
| 54 | /* Set RFC default values for unspecified parameters. */ |
| 55 | quic_dflt_transport_params_cpy(p); |
| 56 | |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 57 | /* Set the max_udp_payload_size value. If not would equal to |
| 58 | * QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE |
| 59 | */ |
| 60 | p->max_udp_payload_size = QUIC_MAX_UDP_PAYLOAD_SIZE; |
Frédéric Lécaille | 1d96d6e | 2022-05-23 16:38:14 +0200 | [diff] [blame] | 61 | if (server) |
| 62 | p->max_idle_timeout = global.tune.quic_frontend_max_idle_timeout; |
| 63 | else |
| 64 | p->max_idle_timeout = global.tune.quic_backend_max_idle_timeout; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 65 | |
| 66 | p->initial_max_streams_bidi = max_streams_bidi; |
| 67 | p->initial_max_streams_uni = max_streams_uni; |
| 68 | p->initial_max_stream_data_bidi_local = ncb_size; |
| 69 | p->initial_max_stream_data_bidi_remote = ncb_size; |
| 70 | p->initial_max_stream_data_uni = ncb_size; |
| 71 | p->initial_max_data = (max_streams_bidi + max_streams_uni) * ncb_size; |
| 72 | |
| 73 | if (server) |
| 74 | p->with_stateless_reset_token = 1; |
| 75 | |
| 76 | p->active_connection_id_limit = 8; |
| 77 | |
| 78 | p->retry_source_connection_id.len = 0; |
| 79 | } |
| 80 | |
| 81 | /* Encode <addr> preferred address transport parameter in <buf> without its |
| 82 | * "type+len" prefix. Note that the IP addresses must be encoded in network byte |
| 83 | * order. |
| 84 | * So ->ipv4_addr and ->ipv6_addr, which are buffers, must contained values |
| 85 | * already encoded in network byte order. |
| 86 | * It is the responsibility of the caller to check there is enough room in <buf> to encode |
| 87 | * this address. |
| 88 | * Never fails. |
| 89 | */ |
| 90 | static void quic_transport_param_enc_pref_addr_val(unsigned char **buf, |
| 91 | const unsigned char *end, |
| 92 | struct tp_preferred_address *addr) |
| 93 | { |
| 94 | write_n16(*buf, addr->ipv4_port); |
| 95 | *buf += sizeof addr->ipv4_port; |
| 96 | |
| 97 | memcpy(*buf, addr->ipv4_addr, sizeof addr->ipv4_addr); |
| 98 | *buf += sizeof addr->ipv4_addr; |
| 99 | |
| 100 | write_n16(*buf, addr->ipv6_port); |
| 101 | *buf += sizeof addr->ipv6_port; |
| 102 | |
| 103 | memcpy(*buf, addr->ipv6_addr, sizeof addr->ipv6_addr); |
| 104 | *buf += sizeof addr->ipv6_addr; |
| 105 | |
| 106 | *(*buf)++ = addr->cid.len; |
| 107 | if (addr->cid.len) { |
| 108 | memcpy(*buf, addr->cid.data, addr->cid.len); |
| 109 | *buf += addr->cid.len; |
| 110 | } |
| 111 | |
| 112 | memcpy(*buf, addr->stateless_reset_token, sizeof addr->stateless_reset_token); |
| 113 | *buf += sizeof addr->stateless_reset_token; |
| 114 | } |
| 115 | |
| 116 | /* Decode into <addr> preferred address transport parameter found in <*buf> buffer. |
| 117 | * Returns 1 if succeeded, 0 if not. |
| 118 | */ |
| 119 | static int quic_transport_param_dec_pref_addr(struct tp_preferred_address *addr, |
| 120 | const unsigned char **buf, |
| 121 | const unsigned char *end) |
| 122 | { |
| 123 | ssize_t addr_len; |
| 124 | |
| 125 | addr_len = sizeof addr->ipv4_port + sizeof addr->ipv4_addr; |
| 126 | addr_len += sizeof addr->ipv6_port + sizeof addr->ipv6_addr; |
| 127 | addr_len += sizeof addr->cid.len; |
| 128 | |
| 129 | if (end - *buf < addr_len) |
| 130 | return 0; |
| 131 | |
| 132 | addr->ipv4_port = read_n16(*buf); |
| 133 | *buf += sizeof addr->ipv4_port; |
| 134 | |
| 135 | memcpy(addr->ipv4_addr, *buf, sizeof addr->ipv4_addr); |
| 136 | *buf += sizeof addr->ipv4_addr; |
| 137 | |
| 138 | addr->ipv6_port = read_n16(*buf); |
| 139 | *buf += sizeof addr->ipv6_port; |
| 140 | |
| 141 | memcpy(addr->ipv6_addr, *buf, sizeof addr->ipv6_addr); |
| 142 | *buf += sizeof addr->ipv6_addr; |
| 143 | |
| 144 | addr->cid.len = *(*buf)++; |
| 145 | if (addr->cid.len) { |
| 146 | if (end - *buf > addr->cid.len || addr->cid.len > sizeof addr->cid.data) |
| 147 | return 0; |
| 148 | memcpy(addr->cid.data, *buf, addr->cid.len); |
| 149 | *buf += addr->cid.len; |
| 150 | } |
| 151 | |
| 152 | if (end - *buf != sizeof addr->stateless_reset_token) |
| 153 | return 0; |
| 154 | |
| 155 | memcpy(addr->stateless_reset_token, *buf, end - *buf); |
| 156 | *buf += sizeof addr->stateless_reset_token; |
| 157 | |
| 158 | return *buf == end; |
| 159 | } |
| 160 | |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 161 | /* Decode into <v> version information received transport parameters from <*buf> |
| 162 | * buffer. <server> must be set to 1 for QUIC clients which receive server |
| 163 | * transport parameters, and 0 for QUIC servers which receive client transport |
| 164 | * parameters. |
| 165 | * Also set the QUIC negotiated version into <tp>. |
| 166 | * Return 1 if succeeded, 0 if not. |
| 167 | */ |
| 168 | static int quic_transport_param_dec_version_info(struct tp_version_information *tp, |
| 169 | const unsigned char **buf, |
| 170 | const unsigned char *end, int server) |
| 171 | { |
| 172 | size_t tp_len = end - *buf; |
| 173 | const uint32_t *ver; |
| 174 | |
| 175 | /* <tp_len> must be a multiple of sizeof(uint32_t) */ |
| 176 | if (tp_len < sizeof tp->choosen || (tp_len & 0x3)) |
| 177 | return 0; |
| 178 | |
| 179 | tp->choosen = ntohl(*(uint32_t *)*buf); |
| 180 | /* Must not be null */ |
| 181 | if (!tp->choosen) |
| 182 | return 0; |
| 183 | |
| 184 | *buf += sizeof tp->choosen; |
| 185 | tp->others = (const uint32_t *)*buf; |
| 186 | |
| 187 | /* Others versions must not be null */ |
| 188 | for (ver = tp->others; ver < (const uint32_t *)end; ver++) { |
| 189 | if (!*ver) |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | if (server) |
| 194 | /* TODO: not supported */ |
| 195 | return 0; |
| 196 | |
Frédéric Lécaille | 4f5777a | 2022-06-20 19:39:26 +0200 | [diff] [blame] | 197 | tp->nb_others = (end - (const unsigned char *)tp->others) / sizeof *tp->others; |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 198 | for (ver = tp->others; ver < (const uint32_t *)end; ver++) { |
| 199 | if (!tp->negotiated_version) { |
| 200 | int i; |
| 201 | |
| 202 | for (i = 0; i < quic_versions_nb; i++) { |
| 203 | if (ntohl(*ver) == quic_versions[i].num) { |
| 204 | tp->negotiated_version = &quic_versions[i]; |
| 205 | break; |
| 206 | } |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | if (preferred_version && ntohl(*ver) == preferred_version->num) { |
| 211 | tp->negotiated_version = preferred_version; |
| 212 | goto out; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | out: |
| 217 | *buf = end; |
| 218 | |
| 219 | return 1; |
| 220 | } |
| 221 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 222 | /* Decode into <p> struct a transport parameter found in <*buf> buffer with |
| 223 | * <type> as type and <len> as length, depending on <server> boolean value which |
| 224 | * must be set to 1 for a server (haproxy listener) or 0 for a client (connection |
| 225 | * to an haproxy server). |
| 226 | */ |
| 227 | static int quic_transport_param_decode(struct quic_transport_params *p, |
| 228 | int server, uint64_t type, |
| 229 | const unsigned char **buf, size_t len) |
| 230 | { |
| 231 | const unsigned char *end = *buf + len; |
| 232 | |
| 233 | switch (type) { |
| 234 | case QUIC_TP_ORIGINAL_DESTINATION_CONNECTION_ID: |
| 235 | if (!server || len > sizeof p->original_destination_connection_id.data) |
| 236 | return 0; |
| 237 | |
| 238 | if (len) |
| 239 | memcpy(p->original_destination_connection_id.data, *buf, len); |
| 240 | p->original_destination_connection_id.len = len; |
| 241 | *buf += len; |
| 242 | p->original_destination_connection_id_present = 1; |
| 243 | break; |
| 244 | case QUIC_TP_INITIAL_SOURCE_CONNECTION_ID: |
| 245 | if (len > sizeof p->initial_source_connection_id.data) |
| 246 | return 0; |
| 247 | |
| 248 | if (len) |
| 249 | memcpy(p->initial_source_connection_id.data, *buf, len); |
| 250 | p->initial_source_connection_id.len = len; |
| 251 | *buf += len; |
| 252 | p->initial_source_connection_id_present = 1; |
| 253 | break; |
| 254 | case QUIC_TP_STATELESS_RESET_TOKEN: |
| 255 | if (!server || len != sizeof p->stateless_reset_token) |
| 256 | return 0; |
| 257 | memcpy(p->stateless_reset_token, *buf, len); |
| 258 | *buf += len; |
| 259 | p->with_stateless_reset_token = 1; |
| 260 | break; |
| 261 | case QUIC_TP_PREFERRED_ADDRESS: |
| 262 | if (!server) |
| 263 | return 0; |
| 264 | if (!quic_transport_param_dec_pref_addr(&p->preferred_address, buf, *buf + len)) |
| 265 | return 0; |
| 266 | p->with_preferred_address = 1; |
| 267 | break; |
| 268 | case QUIC_TP_MAX_IDLE_TIMEOUT: |
| 269 | if (!quic_dec_int(&p->max_idle_timeout, buf, end)) |
| 270 | return 0; |
| 271 | break; |
| 272 | case QUIC_TP_MAX_UDP_PAYLOAD_SIZE: |
| 273 | if (!quic_dec_int(&p->max_udp_payload_size, buf, end)) |
| 274 | return 0; |
| 275 | break; |
| 276 | case QUIC_TP_INITIAL_MAX_DATA: |
| 277 | if (!quic_dec_int(&p->initial_max_data, buf, end)) |
| 278 | return 0; |
| 279 | break; |
| 280 | case QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: |
| 281 | if (!quic_dec_int(&p->initial_max_stream_data_bidi_local, buf, end)) |
| 282 | return 0; |
| 283 | break; |
| 284 | case QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: |
| 285 | if (!quic_dec_int(&p->initial_max_stream_data_bidi_remote, buf, end)) |
| 286 | return 0; |
| 287 | break; |
| 288 | case QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI: |
| 289 | if (!quic_dec_int(&p->initial_max_stream_data_uni, buf, end)) |
| 290 | return 0; |
| 291 | break; |
| 292 | case QUIC_TP_INITIAL_MAX_STREAMS_BIDI: |
| 293 | if (!quic_dec_int(&p->initial_max_streams_bidi, buf, end)) |
| 294 | return 0; |
| 295 | break; |
| 296 | case QUIC_TP_INITIAL_MAX_STREAMS_UNI: |
| 297 | if (!quic_dec_int(&p->initial_max_streams_uni, buf, end)) |
| 298 | return 0; |
| 299 | break; |
| 300 | case QUIC_TP_ACK_DELAY_EXPONENT: |
| 301 | if (!quic_dec_int(&p->ack_delay_exponent, buf, end) || |
| 302 | p->ack_delay_exponent > QUIC_TP_ACK_DELAY_EXPONENT_LIMIT) |
| 303 | return 0; |
| 304 | break; |
| 305 | case QUIC_TP_MAX_ACK_DELAY: |
| 306 | if (!quic_dec_int(&p->max_ack_delay, buf, end) || |
| 307 | p->max_ack_delay > QUIC_TP_MAX_ACK_DELAY_LIMIT) |
| 308 | return 0; |
| 309 | break; |
| 310 | case QUIC_TP_DISABLE_ACTIVE_MIGRATION: |
| 311 | /* Zero-length parameter type. */ |
| 312 | if (len != 0) |
| 313 | return 0; |
| 314 | p->disable_active_migration = 1; |
| 315 | break; |
| 316 | case QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT: |
| 317 | if (!quic_dec_int(&p->active_connection_id_limit, buf, end)) |
| 318 | return 0; |
| 319 | break; |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 320 | case QUIC_TP_DRAFT_VERSION_INFORMATION: |
| 321 | if (!quic_transport_param_dec_version_info(&p->version_information, |
| 322 | buf, *buf + len, server)) |
| 323 | return 0; |
| 324 | break; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 325 | default: |
| 326 | *buf += len; |
| 327 | }; |
| 328 | |
| 329 | return *buf == end; |
| 330 | } |
| 331 | |
| 332 | /* Encode <type> and <len> variable length values in <buf>. |
| 333 | * Returns 1 if succeeded, 0 if not. |
| 334 | */ |
| 335 | static int quic_transport_param_encode_type_len(unsigned char **buf, |
| 336 | const unsigned char *end, |
| 337 | uint64_t type, uint64_t len) |
| 338 | { |
| 339 | return quic_enc_int(buf, end, type) && quic_enc_int(buf, end, len); |
| 340 | } |
| 341 | |
| 342 | /* Decode variable length type and length values of a QUIC transport parameter |
| 343 | * into <type> and <len> found in <*buf> buffer. |
| 344 | * Returns 1 if succeeded, 0 if not. |
| 345 | */ |
| 346 | static int quic_transport_param_decode_type_len(uint64_t *type, uint64_t *len, |
| 347 | const unsigned char **buf, |
| 348 | const unsigned char *end) |
| 349 | { |
| 350 | return quic_dec_int(type, buf, end) && quic_dec_int(len, buf, end); |
| 351 | } |
| 352 | |
| 353 | /* Encode <param> bytes stream with <type> as type and <length> as length into buf. |
| 354 | * Returns 1 if succeeded, 0 if not. |
| 355 | */ |
| 356 | static int quic_transport_param_enc_mem(unsigned char **buf, const unsigned char *end, |
| 357 | uint64_t type, void *param, uint64_t length) |
| 358 | { |
| 359 | if (!quic_transport_param_encode_type_len(buf, end, type, length)) |
| 360 | return 0; |
| 361 | |
| 362 | if (end - *buf < length) |
| 363 | return 0; |
| 364 | |
| 365 | if (length) |
| 366 | memcpy(*buf, param, length); |
| 367 | *buf += length; |
| 368 | |
| 369 | return 1; |
| 370 | } |
| 371 | |
| 372 | /* Encode <val> 64-bits value as variable length integer into <buf>. |
| 373 | * Returns 1 if succeeded, 0 if not. |
| 374 | */ |
| 375 | static int quic_transport_param_enc_int(unsigned char **buf, |
| 376 | const unsigned char *end, |
| 377 | uint64_t type, uint64_t val) |
| 378 | { |
| 379 | size_t len; |
| 380 | |
| 381 | len = quic_int_getsize(val); |
| 382 | |
| 383 | return len && quic_transport_param_encode_type_len(buf, end, type, len) && |
| 384 | quic_enc_int(buf, end, val); |
| 385 | } |
| 386 | |
| 387 | /* Returns the required length in bytes to encode <cid> QUIC connection ID. */ |
| 388 | static inline size_t sizeof_quic_cid(const struct tp_cid *cid) |
| 389 | { |
| 390 | return sizeof cid->len + cid->len; |
| 391 | } |
| 392 | |
| 393 | /* Encode <addr> preferred address into <buf>. |
| 394 | * Note that the IP addresses must be encoded in network byte order. |
| 395 | * So ->ipv4_addr and ->ipv6_addr, which are buffers, must contained |
| 396 | * values already encoded in network byte order. |
| 397 | * Returns 1 if succeeded, 0 if not. |
| 398 | */ |
| 399 | static int quic_transport_param_enc_pref_addr(unsigned char **buf, |
| 400 | const unsigned char *end, |
| 401 | struct tp_preferred_address *addr) |
| 402 | { |
| 403 | uint64_t addr_len = 0; |
| 404 | |
| 405 | addr_len += sizeof addr->ipv4_port + sizeof addr->ipv4_addr; |
| 406 | addr_len += sizeof addr->ipv6_port + sizeof addr->ipv6_addr; |
| 407 | addr_len += sizeof_quic_cid(&addr->cid); |
| 408 | addr_len += sizeof addr->stateless_reset_token; |
| 409 | |
| 410 | if (!quic_transport_param_encode_type_len(buf, end, QUIC_TP_PREFERRED_ADDRESS, addr_len)) |
| 411 | return 0; |
| 412 | |
| 413 | if (end - *buf < addr_len) |
| 414 | return 0; |
| 415 | |
| 416 | quic_transport_param_enc_pref_addr_val(buf, end, addr); |
| 417 | |
| 418 | return 1; |
| 419 | } |
| 420 | |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 421 | /* Encode version information transport parameters with <choosen_version> as choosen |
| 422 | * version. |
| 423 | * Return 1 if succeeded, 0 if not. |
| 424 | */ |
| 425 | static int quic_transport_param_enc_version_info(unsigned char **buf, |
| 426 | const unsigned char *end, |
| 427 | const struct quic_version *choosen_version, |
| 428 | int server) |
| 429 | { |
| 430 | int i; |
| 431 | uint64_t tp_len; |
| 432 | uint32_t ver; |
| 433 | |
| 434 | tp_len = sizeof choosen_version->num + quic_versions_nb * sizeof(uint32_t); |
| 435 | if (!quic_transport_param_encode_type_len(buf, end, |
| 436 | QUIC_TP_DRAFT_VERSION_INFORMATION, |
| 437 | tp_len)) |
| 438 | return 0; |
| 439 | |
| 440 | if (end - *buf < tp_len) |
| 441 | return 0; |
| 442 | |
| 443 | /* First: choosen version */ |
| 444 | ver = htonl(choosen_version->num); |
| 445 | memcpy(*buf, &ver, sizeof ver); |
| 446 | *buf += sizeof ver; |
| 447 | /* For servers: all supported version, choosen included */ |
| 448 | for (i = 0; i < quic_versions_nb; i++) { |
| 449 | ver = htonl(quic_versions[i].num); |
| 450 | memcpy(*buf, &ver, sizeof ver); |
| 451 | *buf += sizeof ver; |
| 452 | } |
| 453 | |
| 454 | return 1; |
| 455 | } |
| 456 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 457 | /* Encode <p> transport parameter into <buf> depending on <server> value which |
| 458 | * must be set to 1 for a server (haproxy listener) or 0 for a client |
| 459 | * (connection to a haproxy server). |
| 460 | * Return the number of bytes consumed if succeeded, 0 if not. |
| 461 | */ |
| 462 | int quic_transport_params_encode(unsigned char *buf, |
| 463 | const unsigned char *end, |
| 464 | struct quic_transport_params *p, |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 465 | const struct quic_version *choosen_version, |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 466 | int server) |
| 467 | { |
| 468 | unsigned char *head; |
| 469 | unsigned char *pos; |
| 470 | |
| 471 | head = pos = buf; |
| 472 | if (server) { |
| 473 | if (!quic_transport_param_enc_mem(&pos, end, |
| 474 | QUIC_TP_ORIGINAL_DESTINATION_CONNECTION_ID, |
| 475 | p->original_destination_connection_id.data, |
| 476 | p->original_destination_connection_id.len)) |
| 477 | return 0; |
| 478 | |
| 479 | if (p->retry_source_connection_id.len) { |
| 480 | if (!quic_transport_param_enc_mem(&pos, end, |
| 481 | QUIC_TP_RETRY_SOURCE_CONNECTION_ID, |
| 482 | p->retry_source_connection_id.data, |
| 483 | p->retry_source_connection_id.len)) |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | if (p->with_stateless_reset_token && |
| 488 | !quic_transport_param_enc_mem(&pos, end, QUIC_TP_STATELESS_RESET_TOKEN, |
| 489 | p->stateless_reset_token, |
| 490 | sizeof p->stateless_reset_token)) |
| 491 | return 0; |
| 492 | if (p->with_preferred_address && |
| 493 | !quic_transport_param_enc_pref_addr(&pos, end, &p->preferred_address)) |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | if (!quic_transport_param_enc_mem(&pos, end, |
| 498 | QUIC_TP_INITIAL_SOURCE_CONNECTION_ID, |
| 499 | p->initial_source_connection_id.data, |
| 500 | p->initial_source_connection_id.len)) |
| 501 | return 0; |
| 502 | |
| 503 | if (p->max_idle_timeout && |
| 504 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_IDLE_TIMEOUT, p->max_idle_timeout)) |
| 505 | return 0; |
| 506 | |
| 507 | /* |
| 508 | * "max_packet_size" transport parameter must be transmitted only if different |
| 509 | * of the default value. |
| 510 | */ |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 511 | if (p->max_udp_payload_size != QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 512 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_UDP_PAYLOAD_SIZE, p->max_udp_payload_size)) |
| 513 | return 0; |
| 514 | |
| 515 | if (p->initial_max_data && |
| 516 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_DATA, p->initial_max_data)) |
| 517 | return 0; |
| 518 | |
| 519 | if (p->initial_max_stream_data_bidi_local && |
| 520 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, |
| 521 | p->initial_max_stream_data_bidi_local)) |
| 522 | return 0; |
| 523 | |
| 524 | if (p->initial_max_stream_data_bidi_remote && |
| 525 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, |
| 526 | p->initial_max_stream_data_bidi_remote)) |
| 527 | return 0; |
| 528 | |
| 529 | if (p->initial_max_stream_data_uni && |
| 530 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI, |
| 531 | p->initial_max_stream_data_uni)) |
| 532 | return 0; |
| 533 | |
| 534 | if (p->initial_max_streams_bidi && |
| 535 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAMS_BIDI, |
| 536 | p->initial_max_streams_bidi)) |
| 537 | return 0; |
| 538 | |
| 539 | if (p->initial_max_streams_uni && |
| 540 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAMS_UNI, |
| 541 | p->initial_max_streams_uni)) |
| 542 | return 0; |
| 543 | |
| 544 | /* |
| 545 | * "ack_delay_exponent" transport parameter must be transmitted only if different |
| 546 | * of the default value. |
| 547 | */ |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 548 | if (p->ack_delay_exponent != QUIC_TP_DFLT_ACK_DELAY_COMPONENT && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 549 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_ACK_DELAY_EXPONENT, p->ack_delay_exponent)) |
| 550 | return 0; |
| 551 | |
| 552 | /* |
| 553 | * "max_ack_delay" transport parameter must be transmitted only if different |
| 554 | * of the default value. |
| 555 | */ |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 556 | if (p->max_ack_delay != QUIC_TP_DFLT_MAX_ACK_DELAY && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 557 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_ACK_DELAY, p->max_ack_delay)) |
| 558 | return 0; |
| 559 | |
| 560 | /* 0-length value */ |
| 561 | if (p->disable_active_migration && |
| 562 | !quic_transport_param_encode_type_len(&pos, end, QUIC_TP_DISABLE_ACTIVE_MIGRATION, 0)) |
| 563 | return 0; |
| 564 | |
| 565 | if (p->active_connection_id_limit && |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 566 | p->active_connection_id_limit != QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 567 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT, |
| 568 | p->active_connection_id_limit)) |
| 569 | return 0; |
| 570 | |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 571 | if (!quic_transport_param_enc_version_info(&pos, end, choosen_version, server)) |
| 572 | return 0; |
| 573 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 574 | return pos - head; |
| 575 | } |
| 576 | |
| 577 | /* Decode transport parameters found in <buf> buffer into <p>, depending on |
| 578 | * <server> boolean value which must be set to 1 for a server (haproxy listener) |
| 579 | * or 0 for a client (connection to a haproxy server). |
| 580 | * Returns 1 if succeeded, 0 if not. |
| 581 | */ |
| 582 | static int quic_transport_params_decode(struct quic_transport_params *p, int server, |
| 583 | const unsigned char *buf, |
| 584 | const unsigned char *end) |
| 585 | { |
| 586 | const unsigned char *pos; |
| 587 | |
| 588 | pos = buf; |
| 589 | |
| 590 | while (pos != end) { |
| 591 | uint64_t type, len; |
| 592 | |
| 593 | if (!quic_transport_param_decode_type_len(&type, &len, &pos, end)) |
| 594 | return 0; |
| 595 | |
| 596 | if (end - pos < len) |
| 597 | return 0; |
| 598 | |
| 599 | if (!quic_transport_param_decode(p, server, type, &pos, len)) |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | /* |
| 604 | * A server MUST send original_destination_connection_id transport parameter. |
| 605 | * initial_source_connection_id must be present both for server and client. |
| 606 | */ |
| 607 | if ((server && !p->original_destination_connection_id_present) || |
| 608 | !p->initial_source_connection_id_present) |
| 609 | return 0; |
| 610 | |
| 611 | return 1; |
| 612 | } |
| 613 | |
| 614 | /* Store transport parameters found in <buf> buffer into <qc> QUIC connection |
| 615 | * depending on <server> value which must be 1 for a server (haproxy listener) |
| 616 | * or 0 for a client (connection to a haproxy server). |
| 617 | * Note that peer transport parameters are stored in the TX part of the connection: |
| 618 | * they are used to send packets to the peer with its transport parameters as |
| 619 | * limitations. |
| 620 | * Returns 1 if succeeded, 0 if not. |
| 621 | */ |
| 622 | int quic_transport_params_store(struct quic_conn *qc, int server, |
| 623 | const unsigned char *buf, |
| 624 | const unsigned char *end) |
| 625 | { |
| 626 | struct quic_transport_params *tx_params = &qc->tx.params; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 627 | |
| 628 | /* initialize peer TPs to RFC default value */ |
| 629 | quic_dflt_transport_params_cpy(tx_params); |
| 630 | |
| 631 | if (!quic_transport_params_decode(tx_params, server, buf, end)) |
| 632 | return 0; |
| 633 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 634 | return 1; |
| 635 | } |
| 636 | |
| 637 | /* QUIC server (or haproxy listener) only function. |
| 638 | * Initialize the local transport parameters <rx_params> from <listener_params> |
| 639 | * coming from configuration and Initial packet information (destintation |
Frédéric Lécaille | e9325e9 | 2022-08-11 17:24:38 +0200 | [diff] [blame] | 640 | * connection ID, source connection ID, original destination connection ID from |
| 641 | * client token. |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 642 | * Returns 1 if succeeded, 0 if not. |
| 643 | */ |
| 644 | int qc_lstnr_params_init(struct quic_conn *qc, |
| 645 | const struct quic_transport_params *listener_params, |
| 646 | const unsigned char *stateless_reset_token, |
| 647 | const unsigned char *dcid, size_t dcidlen, |
| 648 | const unsigned char *scid, size_t scidlen, |
Frédéric Lécaille | 7629f5d | 2022-08-11 18:54:26 +0200 | [diff] [blame] | 649 | const struct quic_cid *token_odcid) |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 650 | { |
| 651 | struct quic_transport_params *rx_params = &qc->rx.params; |
| 652 | struct tp_cid *odcid_param = &rx_params->original_destination_connection_id; |
| 653 | |
| 654 | /* Copy the transport parameters. */ |
| 655 | *rx_params = *listener_params; |
| 656 | /* Copy the stateless reset token */ |
| 657 | memcpy(rx_params->stateless_reset_token, stateless_reset_token, |
| 658 | sizeof rx_params->stateless_reset_token); |
| 659 | /* Copy original_destination_connection_id transport parameter. */ |
Frédéric Lécaille | e9325e9 | 2022-08-11 17:24:38 +0200 | [diff] [blame] | 660 | if (token_odcid) { |
Frédéric Lécaille | 7629f5d | 2022-08-11 18:54:26 +0200 | [diff] [blame] | 661 | memcpy(odcid_param->data, token_odcid->data, token_odcid->len); |
| 662 | odcid_param->len = token_odcid->len; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 663 | /* Copy retry_source_connection_id transport parameter. */ |
| 664 | memcpy(rx_params->retry_source_connection_id.data, dcid, dcidlen); |
| 665 | rx_params->retry_source_connection_id.len = dcidlen; |
| 666 | } |
| 667 | else { |
| 668 | memcpy(odcid_param->data, dcid, dcidlen); |
| 669 | odcid_param->len = dcidlen; |
| 670 | } |
| 671 | |
| 672 | /* Copy the initial source connection ID. */ |
| 673 | memcpy(rx_params->initial_source_connection_id.data, scid, scidlen); |
| 674 | rx_params->initial_source_connection_id.len = scidlen; |
Frédéric Lécaille | c7785b5 | 2022-05-23 09:08:54 +0200 | [diff] [blame] | 675 | TRACE_PROTO("\nRX(local) transp. params.", QUIC_EV_TRANSP_PARAMS, qc, rx_params); |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 676 | |
| 677 | return 1; |
| 678 | } |
| 679 | |